Adhesive material



Patented Apr. 1924.

UNITED STATES PATENT OFFICE.

WILLIAM- rosnrn ownns, or San raucrsco, cn rroama ADHESIVE mrnnnn.

No Drawing.

Francisco and. State of California, have in-' vented a new and useful Adhesive Material,

of which the following is a specification.

This invention relates to building material and particularly toadhesive material used in the manufacture of sheet-like composition.

material formed of wood and paper, and suitable for w alls, partitions and the like.

It is an object of the present invention to provide an improved composition board that is of highly'fire-resistant properties.

It is a further object of the present in; vention to provide a composition board that is comparatively inexpensive in cost of construction and in cost of materials of which it is composed.

Itis further an object of the present invention to provide an improved fire resistant and adhesive substance particularly useful in the construction of composition boards. 4

The invention possesses other objects and features of advantages, some of which, with the foregoing, will be made manifest'in the following description of the preferred form of the invention. It is to be understood that it is not intended to limit the invention zthe embodiment set forth in the description as) vai'iations may be adopted withinthefiscope. of ;the invention as set forth in'the claim;

A well known1-t' pe"0 composition board is. that which em ies. a generally plane body structure, consistin of an arrangement of flat, thin lathset su 40 edge and coatedon the opposite faces of antially edge to- Application filed March 31, 1921. 7 Serial No. 557,4.

the whole with sheets of fiber or chip board adhesively secured to the faces of the lath body. i

, his invention embodies a composition board characterized by the utilization of afire resistant adhesive mixture which serves the purposenot only of adhesively securing the outer chip-board or paper to the body of laths but also, by substantially entirely embeddini each of the laths, materiallin- 5 creasing t e fire resistant propertieso the whole construction, so that even if the chipboard or paper be soorchedor burned the wooden body or latli of the structure will.

I still be preserved ,against burning by the enclosing fire resistant adhesive.

A fire-resistant adhesive is produced by the following One uartof white glue is dissolved for twelve ours in 'one and onehalf quarts of water. There is then thor oughly mixed with the dissolved glue, two quarts of finishing plaster, preferably in ry condition, one quart of clingstone, magnesite in finely powderedv form, and threequarters of a quart of whitin 1 This ooin- 05 position is thorough] mixe and heated to about 150 Fahren eitand is applied to the lath body-while in heated condition to prevent setting of the adhesive before the chi -board is applied.

at is claimed is: I

A fire resistant adhesive consisting of a mixture of one part white gluezdissolved twelve-hours in one and one-half arts .water; two parts finishing plaster dry) one part magnesite, andthree-quarters part whiting, all-by volume.

In testimony whereof, I have hereunto set my hand. a.. t

WILLIAM JOSEPH OWENS. 

